Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0034ab7cddfcee1…

MALICIOUS

PDF

95.3 KB Created: 2021-06-10 05:18:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: cd5a81ceb52debe676016d949a1c6604 SHA-1: 66392762a7df7fdb29cd5b4ef0d80473d24a42ad SHA-256: a0034ab7cddfcee1146263570e33036408ff6236932a0094a39758265b4045e0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous links, many hosted on compromised WordPress sites, directing users to external URLs. The document body, though heavily obfuscated, appears to be a lure for free manga, which is a common tactic for phishing and malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://coretry.ru/uplcv?utm_term=love+is+an+illusion+free+manga PDF link annotation
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f0ebd3de6c---35307625928.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e83e775b71---60500800404.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/sc6qgm4opur4t87j9dg0udi4of/70390185652.pdfIn PDF document text
    • https://fceresources.com/ckfinder/userfiles/files/1637384851.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/879cf2e82b14a6150b6b38fa3387eb5b/78375663151.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/q60nq9eae3nark48un3mqojeps/fatuxikelegafijawumegefax.pdfIn PDF document text
    • http://niengrangchuyensau.com/upload/contentFile/file/bakaratavototagu.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/julujosotule.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/4auinsd4fdhpdkn4rn0k6fssrt/45602346460.pdfIn PDF document text
    • https://yucekalipmakina.com/tsrm1/img/userfiles/file/26137373083.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8d76ef9e9---sorozosipowenanagofuniwe.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/d690c4548360c348cefcb2693cf7042f/84455845815.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609484b14c6e7---gepuxevo.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/4jcpevl6re6el8uqe47mg7q45u/gesenisupapabijewumis.pdfIn PDF document text
    • http://au-coeur-du-temps.com/userfiles/file/72234568578.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdfc1e2288---sawojavenurizoronajomup.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/ah0atqhdi97a9jkl6lapvpmqmm/31654601531.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA71 13516 bytes
SHA-256: 12c5bedb0b9c4e2563ef276b4045adac7badc54bb4db18a5d9362c67ee6a67d7
font_01_sfnt_off0001139c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1139C 5088 bytes
SHA-256: ad0aefeccbd9ad4bf707de041f2b307fd46e4a5de22ccde42daefb5e3fb1019c
font_02_sfnt_off000124db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124DB 2384 bytes
SHA-256: fdd23327100bc641eecbeea2f5f05c0f0fdfcc85fb63d83c3da1a8077e1ccd36
font_03_sfnt_off00012f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F6B 12196 bytes
SHA-256: 135d0eca7a1d8013e8768e6f6e60b7e8d056552743d53dd1449c067398fc6583
font_04_sfnt_off0001578d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1578D 16368 bytes
SHA-256: 930bdb000e3ab195650edb44e660442ade8ad7f829772209fe4593fbe90c8eb4

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